66482-29-9Relevant articles and documents
Regio- and stereoselective synthesis of bromoalkenes by homolytic hydrobromination of alkynes with hydrogen bromide
Kinoshita, Hidenori,Kumaki, Wataru,Miura, Katsukiyo
, (2022/03/07)
Homolytic hydrobromination of terminal and internal alkynes with a commercially available solution of hydrogen bromide in acetic acid has been investigated for regio- and stereoselective synthesis of bromoalkenes. Under an aerobic atmosphere at room temperature, the reaction of ethynylarenes with a small excess of HBr efficiently gave (2-bromoethenyl)arenes with good to high E-selectivity. (Alk-1-ynyl)arenes, or internal alkynes bearing both phenyl and alkyl groups at the sp-carbons also underwent the air-initiated hydrobromination to exhibit high Z-selectivity under kinetic conditions using a half equivalent of HBr.
Cyclic Diaryl λ3-Bromanes: A Rapid Access to Molecular Complexity via Cycloaddition Reactions
Lanzi, Matteo,Ali Abdine, Racha Abed,De Abreu, Maxime,Wencel-Delord, Joanna
supporting information, p. 9047 - 9052 (2021/12/06)
Biaryls have widespread applications in organic synthesis. However, sequentially polysubstituted biaryls are underdeveloped due to their challenging preparation. Herein, we report the synthesis of dissymetric 2,3,2′,3′,4-substituted biaryls via pericyclic reactions of cyclic diaryl λ3-bromanes. The functional groups tolerance and atom economy allow access to molecular complexity in a single reaction step. Continuous flow protocol has been designed for the scale-up of the reaction, while postfunctionalizations have been developed taking advantage of the residual Br-atom.
2-arylvinyl-cyclic amine derivative, preparation method and applications thereof
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Paragraph 0044-0048; 0051-0055, (2020/04/29)
The invention belongs to the technical field of medicines, and discloses a 2-arylvinyl-cyclic amine derivative, a preparation method and applications thereof. The biological activity test results showthat the 2-arylvinyl-cyclic amine derivative has selective M1 receptor antagonism activity. The compounds can be used as a pharmaceutically active ingredient in treatment of diseases mediated by a M1receptor. According to the method, the 2-arylvinyl-cyclic amine derivative can be obtained by reacting -diarylalkylene bromide and cyclic tertiary amine, and the simple and efficient method for synthesizing the 2-aryl vinyl-cyclic amine derivative is provided.